Controller for electric motors.



No. 883,200. Y -PATENTED MAR. 31. 190C.

. E. D.. JAMEE. CONTROLLER ECR ELECTRIC MOTORS. APPLICATION FILED MAY16,1906.

5 SHEETS-SHEET 1.

l Ly NTCR f ATTCRNEY uur] wnNEssEs:

No. 883,200. PATBNTBD MAR. 31, 1908.

` H. n. JAMES. CONTROLLER-FOR ELBGTMG MOTORS.

APPLIYGATIGN FILED MAY16,1906.

5 SHEETS-SHEET 2.

WITNESSES: mvENToR Nmaasoo. l PATBNTEDMAR. 31, 190s. H. DJJMBS.

. CONTROLLBRPOR Emome- MOTORS.

APPLIGAqfIoN HLBUMAY 16,1906.

wHNESSEs: y INVENTOR l BY 'E A-TTORNEY PATENTED 4MAR: 8l, 1908.

n H. OJAMRS. CONTROLLER ROR RLRO'R'RI'O MOTORS.

APPLICATION 4IILEID MAY-16. 1906.

5 SHBBTSSHRLT 4.

-INVENTOR WITNESSES:

PATENTED MAB. 31, 1908.

HAIL JAMES. GGNTRGLLER FR vBLIEZGTRIG 'MTORS.

APELIGATION ULEB une. 1906.

5 SHEETS-SHEET 5.

lNVENTOR To all/whom. it may conc-era:

OFFICE f 1 CoN'rRoiLnitjioRELEoTnIo MOTORS;

No', ssaaoo. i

Be it- `known that I', vHENRY D.

Electric;Motors,.of which the following isa specification.

l MY iDVGIIOD relatesto controllers tor elec,L tric motors and"particularlyto such contr01=-4f lers asl are. adapted for use vwith compound 0f"- yshunt `wound motors.`

The obj ect of my invention reversing controllerifor v`shunt or compound wound motors that shall be simple and .dura--` ble inconstriiction, that shall occupy a relak tively small space and that shall govern both the armature/and iield of the motorv by means of asingleoperatinghandle. Reyersing` controllers which combine armature and field control l'iave"usually coinprisedeitlier an armature control drum and a field rheostatnor more thanone operating handle.. l

According to my present invention Iemployan armature-controlling device, of the' general formfs'hown and described in Patent No. 774,800, granted November 15, 1904, to Testinghousef Electric & ).lanufadturing Company, 'assignee of. Hermon L. VanValkenburg, which' determines the direction of' rotation 'of .the motor and includes suitable resistance in series with fthewarmature when the motor ishstartedp ln combination with this device, l einplo'y a held rheostatof' well known construction which is adapted to regu late thevalues Dielectric current traversing A the sliuntficldmagnet winding. The two;v controlling devices' may bedisposed in par! `;ar llel. planes' and be operated by a sliait which is perpendicular to these planes and` to which` 'an operating` handle, similar to that ordi naiily Yemployed with drum controllers', is attach'ed.l lnthis way, l obtain all the oper, ating-advantages of the drum controller and reduce its size. :since 'the armaturecontrollingilevice occupiesmaterially less space than thc` control drum ordinarily used.

My controller is notlii-nitedY toany specific. `application or use, but lit 1s particularly Awell,

adaptcdlor use with relatively small shunt n or' compound wound inotorssuch'asare employed forilriving machine tools'. A mov# al lccontact anni olltlie fieldirheestat is ind-5a n. JAMES, aV citizen ot the .United States, and a resident is to provide a panying drawings in which .stationary con/tact terminals 9.

multipley contact member of the armature- Vcontrolling,device is connected'toA the same shaft `by a lost-motion connection of such:-

v A ...Specicatonof Letters Patent..r `Patented March 3].,v 190.8. f. .Application filed May 16,1906. seriaiNo. 317,228.

character that the iirst motion of the operf` p, ating handle from its oi 7 position in either' direction supplies energy to the motor arma- .ture in theorie direction or the other, as the- Case may be, and starts the motor'by con-V i. lneet-ing a suitable resistance in series With'the f .armature and'gradually'reducing such resist-y ance. -As soonasy this relatively short pre-v` 'determined angle has been traversed, the

aforesaid lost-motion connection serves. to release the multi -le coi'itactinember of the armature-control ing device; A .further m0- tion oftheopeiatinghandle serves merely todecrease the field strength by connecti magnet winding.

My invention -is illustrated in the accom-4 Figure 1 's a view, mainly in elevation but partially in section, of a controller c0n` structed in accordance therewith; Fig.. 2 is al plan view, with the'cover removed, ofthe controller` shown in Fig. 1; Fig.' 8 is a sectional View on the line IIL-'HI of Fig. 1; Fig. 4 is a section on the line 1ST- IV of Fig. 1 and Fig. `5 isa diagrammatic view of a control system which discloses the circuit connections for the controller illustrated in Figs. 1, 2, 3 and 4.

Referring to the drawings, the controller here illustrated comprises a' supporting traine 1, insulating slabsor platesv 2 and 3 which are vdisposed in substantially parallel iplanes'and are attached to the frame' 1, and

anop'erating shaft 4 which is substantially v"perpendicular to the insulating plates' 2 and .suitable resistance in series with the fiely 3 andis rotatably mounted in an upper bear'` ing 5 and a lower bearing 6. The lower plate 3 is. `bolt-ed to a standard 7 with which the ,base plate S "of the 'frame 1 is provided, and upon the-plate 3 is mount-ed ain annular set of A movable contact-ymeniberfl()v is. keyed to the 'shaft 4 near itsxlower lextremity and comprises aV `flekiblifz contactftinger 11 which .is adaptedfto engageand make electrical contactgwith'tlie terminals 9 asftlie shaftf 4 isro'tated, a colf@ yattached to thecollector ring 10a sov v .vention 'here shown and described as a desirable adtrical connection may be effected between the k.member 10 and a line conductor.

Between .adjacent contactterminals ofthe set 9, any 'feutable resistance -material may Abe connected. As here shown, each resistance section 13 comprises a resistance wlre Wound upona frame formed. by covering a'corrugated piece of sheet`metal with msulating material, such as asbestos. The insulating plateI 2 is similarly provided with Contact members.14Which are engaged by the extremities of two doublecontact arms 15 and 16 ,that are attached to an insulatin block 17. ln this way, the two arms are e ectrically separated but mechanically connected.

Thearrangement-of contact terminals 1 4 on theinsulating plate 2 is vsuch that all the contact arms simultaneously engage contact terminals.

X'l he insulating block 17 is provided with abushing 19 which is fitted-to the shaft 4 and an eccentric pin 20 which proects for a short distance above the block in a stantially parallel tothe center ofthe shaft 2.

A short distance above the insulating block 17', a ratchet wheel'or cam 21 is rigidly fixed totheshaft 4 and haspa'projecting pin 22, which is in alinement with the pin 20 in 'the off position of the controller, and a-notched riphery whicht is adapted to be engaged y a pawl 23. The awl 23 is fulcrumed upon a stationary sha t 24 at oneextremity andis held in en agement with .the surface of the ratchet whee 21 at its outer extremity by means of a sprin 25. is also fulcrume upon the shaft-24 and the degree of movement of which, in each direction, v'is'llrnited by Aarm`s27 which come into engagement with the frame 1. TheI free ex'-V tremlty of the lever is forkcdand 1s adapted to engage the pins 20 and 22 when itis in 1ts midosition. This position` corresponds to the otf Aposition of the drum and is accentuated by anotch- 28 in the ratchet wheel 21. The approach to this positionfromeither d1- rcction is calledto the attention of theoperating attendant by projections 28v at the sides of the Vnotch in order that the motor i may not inadvertently be reversed when 1t 1s desirableto bring it to rest suddenly.

Since the insulating block 17' and the contact arms .1.5 andl 16 are not fixed to the shaft 4, but'are rotatably mounted thereon,

' the rotation ofthe-*shaft will only effect the rotation ofthe contact member throu h a` predetermined' arci inl either .direction om ine that is sub- An operating lever 26 `connected b the l"off position in which the operating le ver` 26 engages the pins 20 and 22, the pin 22 bemga part of the ratchet wheel 21 which is fixed to the shaft 4.

The shaft 4 may be rotated through its ent1re range of movement in either direction, as determined by .stops 29, only one of which is shown, by means of a handle lever 31 l 'which is fastened to the up er extremity ofA the shaft. The severall fie d control )ositions of the Ihandle are accentuate( by notches32 ona ring member 312a which is mounted on| a cover plate 33. These notches are successively engaged by a pawl 33a -ingthe handle lever as the controller ,passes through its arc of movement.

Although the rotation of the contact arms 15 and 16 islimited to arelatively small are in either direction, the contact arm 10,

The circuit connections fonthe controller i may be more readily understood from Fig. 5 of the ldrawin s to which special reference may now be 'iiad Electrical energy may be supplied from any convenient vsource through'positive line conductor 36 to contact terminal 14", to one extremity of a resistancesection 35, .to stationary Contact finger 12 and to one extremity of `the resist- 'ance 13. When the controller is in its ofi position, contact arm 15 engages Contact terminals 14X, the contact arms 16 the terminals4 14Y and the contact arm 11 'en rages the contact terminal 9a which is midway be- 'tweeri end lterminals 9b, both of which are connected to one extremity of the resistance 13. This extremity of the resistance is also a conductor37 to a shunt field magnetwin ing38 of amotor39, the opposite terminal ofv this winding being connected to a negative line conductor 40.

As the controller moves to the next posi` tion, in a clockwise. direction, the arm 15 moves from engagement with the terminals 14X to engagement with terminals 14b and` the contact' arm 16 moves into enga ement. with terminals 14. When the contro ler occupies this position, energy is supplied from the positive line conductor 36 through resistance section 35, contact arm 15, resistance motor 39, resistance section 35C, contact arm- 16, .resistance section 35d, conductor 44`anda series'field magnetgwindingd' to` themega;

tive lline-conductor 40; As the controller passes` through the next two positions in the samedirection, the only c hanges effected :will be the shortecircuiting of the. resistance of rotation of the motor.' I c The arrangement of parts is such that the 2 0` sections 35a,I 35h, 35`C and 35d,but if the controllcris rotatedl onel notch from the ott77 position-in a counter clockwise direction, circuit connections are completed from the positiveline conductor 36 through resistance sec-` tions 35a,- 35",` armature terminal 43, armaturefterminal 42, resistance section 35h and' resistance section' 35d, from which point-circuit vis completed as before. Thus the direction of rotation of the operatinghandle from the fo position determines' the direction of flow' oi' the currentthrough the armature of the motor` and consequently `tl'iedirectioii contact armsand 16, which are insulated from each otheriand are attached to the block 17, reach. the end of their travel, as

hereinbefore explained, when the resistance sections are short-circuited, and the arrangement of .the iield resistance 1 3 is such that the contact arm 1 1 comes :into engagement with the contact terminals 9Fv just after the armatureecontrolling device has come to rest.

'As the controller` 'passes through successive positions in either direction, vthe portion of the l resistance 13 included in circuit with the ield -magnetf winding 38 is increased.

ll `"This increase in the resistance of the field` circuit serves to decrease the current traversn Although I have shown described a specific arrangement I desire that variations which do not ldepart from the spirit of my in-` vention shallbe included within its scope, and although the controlling device -is yillustrated in connection with a compound wound motor, itsuse is obviously not restricted thereto, but may include other well known types of motors.

I claim, as my invention z 1. A controller for electric motors :coi'iiprisl' ling ka field rlicostat, an armature-reversing faceplatemember, a single operatinghandle,l

a rhecstat arm rigidlyvconnected to said haii- -dle, and a contact larm for said faceplate member having a lost-inotimif connection with said handle.v

i 2; A controller comprising a field rheostat,

arms having a rigid and a lost-motion connection therewith,respect velyf-f g gk 3. In a controller, the co'inbiliatioirivith'an annular set ot' statioirary Contact terii'ifinals, and a pair ci rigidly connectedbut elect-ric ally independent contact armsto engagesaid contact terminals, or' aii'eldrlieostatf'aiid a single operating handle toi' the movable contact arms and the iield ih-eosta't.

4. I n a controller, the conibim'ition with a pair of stationary insulatiiigplates-disposed in substantially parallel planes, l stationary contact terminals circuiiiterentially `ra rranged on'eacli insulating plate, aiOtatableshaft substantiallyv perpendicular tok "tliep-laiies of the insulating plates, a contact arm project` ing from said shaft to engage one set of contact terminals, and amultiple con-'tact arm the extremities yof which `ar e adaptedV 'to iengage the other set of contact-terininals, ofV a lost-motion connection between `'said shaft and said multiple contact ar-iiry 5. In a controller for.*electricmotorsgthe combination'with an ainiular's'etof stat-ionary contact terminals, a pairfotrigidlyconnected but electrically in'lependentfcontact arms to engage said Contact#terminals, sec-- ond set of stationailv contact terminals siinilarly disposed in la plane parallelv to 'that of the first se t,' and :1l-single* movable contact arm therefor, of'a rotatable* shait/for'sai'd movable contact arms,` and ineaiis'for tempo; iarily disconnecting saidfpfair- Contact 'arms vtrom said shaft afteiythe sliaftghasj been rotated 7 through a predetermined v vanglefin either direction from the2 ""foit position ofthe controller. l Y

6. In a controller, the cofmbinatioiifwith a 'driving shaft, a single'operating handle lever attached thereto, a pair oi' insulating'plates disposed at right anglesgto,tliefshafh and staf .tionary contact termin` sinounted on t-he ioo` nals inoun'ted onfsaid plates, a movable engaging arm projecting from the shattto engage one set of Contact.l tein ia'ls, and a pair of rigidly connected Ccontact armsadapted to engage the other set ot-stationaiylcontact terniinals` :and connected to saiillshaftfby a lost-motion connect-ionjolmeans toriotating said Contact arms through'a'iclativellshort angle from a predeteri'n'i .edfpositi'on *at the beginning of the operatinghaiu l ti are).

, S.' In arontrolle'xz; ftlii.\,v-omhination'jwitli a driving shaft, alaiidlc! lever attachcd thereto, insulating plates posmlat 4right-'angles -an armature-reversing faceplate member, a to the shaft, sets (jf/Stationary contact {crini- 65'single operating handle and suitable contact 1 nals indented on said platcs, a movable cn- Vgagmg arin projecting from the driving 'shaft to engageone set of contact terinina1s,arid.a vpair of rigidly connected contact arms adapt,-

,ed to engage theothcrjsetcf stationary'contact terminalsv and connected to said shaft by a lost-motion connection, of means forrotat- ,ing said'contact arms when theshaft is rofl which the controller is adaptedto"occupy,a

tated and for confining the motion ofthe coni tact arir'i'to a predetermined angle.

. 9. -In la controller, the combination with 'a jrotatable shaft, and an operating handle there-' for,- means for accentuating thcpositions -cam fixed to the shaft, a air of stationary contact terminal bearing vp ates perpendicular toA the shaft,.resistances caonnectedbetween said contact terminals, a smvle movable c 'ontact arm pro]ectmgfron1 the siaft to engageone set i of contact terminals, and a pair of'rigidly onnected contact arms to engage the other set of contact terminals, and an insulating support rotatably mountedindependently of the shaft,

' of means for rotatin said pair of4 arms and their support .throug i a predetermined angle *als the sincle contact arm is moved substantially through one revolution. l

10. In a controller, the combination with a rotatable-shaft, an operating handle there' for, means for accentuating the positions which the. controller is adaptedto occupy, a Icam fixed to the-shaft, a` pair of stationary contact terminal bearing plates perpendicularI to the shaft, resistances connected between said contact terminals,'a ysingle conf tact arm rejecting from the shaft to enga0e'-' one set o contact terminals, a pair of rigidly connected contactv arms for theother set of contact terminals, and an insulating su port rotatably mounted independently of) shaft, of a lost-motion connection between the said insulating supportand theshaft, whereby rotation of the shaft in` either direc.

tion actuates the pair of arms only through a s predetermined angle which is materially lessthan the angle traversed by the shaft and the single contact arm projecting therefrom.

11. A controller comprising afield vrhcostat, an armature-reversing faceplate meniber, movable contact members', anda single removable operating shaft for the movable contact members.

12;' In a controller for electric motors, the

.combination with a field rheostat, an armature controlling device, movable Contact members, and a single actuating shaft for themovable contact members having` a keyway at one end, of an o' erating handle att-ached to the other end of t ie shaft,jand' a pin in one l of' the movable members which engages the keywav.

13. ln a controller for4l electric motors, the vcombination with a ieldrheostat, an automembers, and a single actuating I movable Contact members havinvf-a keywaythe situation' matic controlling device, movable j contact shaft for the 'at one end, of 'an' operati'ng'han e attached;

.to the other-.end-of `.the'sh'aftga pinin one of fthe movable lmembers which' engages the' keyway, and a lost-motion `conn'ectionlbc- 1 4, .ll-n ii-controller, thecombination with` a 'driving shaft having a keyW-ay, a handle -lesA ver attached -to 'said` shaft-,"insulating. platesl disp/osedgat-` right angles'to the shaft', station# 75 lary contactterminals' mounted on plates, Aan armprovided with a pro'e'ction' to engage th'ekeyway inthe shaft an vadapted i v-to enga e one setof contact terminals, and a Y rigidly connected. contact arms adapted to engage theother setof stationary pair o conta lt terminals and connected` to said shaft y a lost-motionl connection, of means .for rotating said pair of vcrnntactarms when the shaft-is rotated andfor4 confining the 85 'motion thereof toa predetermined angle.

15'.;In a controller, the combination with 'a' field'rhe'ostat, 'an armature-reversing face-V latel member, .and movable. contact meiners therefor, -of 'asiiigle operating handle 90 vfor the movable contact members, la yielding pawlfin the handle, and a notched ring memer to be engaged by the pawl.v

-16l In a controller for electric motors, the

combination with a field rheostat, `an arma'- 95 tureikcontrolling device, movable contact members' therefor, and a single'v operating shaft'for the members, of an `operating handle'attached to one end of the shaft, a lostmotion connection between one of the-con 1,00

members therefor, a single actuating shaft for the movable members having a keyway at 'one end, an operating handle attached to the 110 other end of the shaft, a pin in one of the movable members which engages the key way, and a-lostinotion connection between the'shaft and the other movable member, of

'means for accentuating the several controller 115 vpositions comprising a notched ring and a yielding pawl m the operating handle.

In testimony whereof, I have hereunto sub- 'scribed my naine this 10th day of May, 1906.

. HENRY D. JAMES.

lVit'nesses EDWIN Liann, Binner HiNns.

tween theshaftand the other movable meiv i ber; i I I n a controller or electric motors,'the 105 

